Filter



Fm 23 wz@ wm@- H., @QE x FILTER Film August 13. 191g; 2

- mgm INVENTOR. h. 6. Cos.

RNEY. x

Patented Feb.` '23, 1.926.

' UNITED STATES PATENT OFFICE.

HARRISON S. COE, on IvIOUND CITY, KANSAS, ASSIGNOR, :BY MESNRASSIGNMENTS, To THE" CYCLE COMPANY, OE COLORADO STRINGS, COLORADO, ACORPORATION OF COLORADO.

FILTER.

Application filed August 13, 1919. Serial No. 317,237.

To all inkom/t may concern:

Be it known that I, HARRISON citizen of the United States, residlng atMound City, in the county of Linn andl paratus for the clarification ofdirty watersv such as those obtained in the performance of metallurgicaland chemical processes, and

. it is particularly adapted for the filtration of pulps and othermaterials which are unsuited for treatment in ordinary filters by`reason of the fineness of their solids or the nature of their chemicalconstituents.

It is the primary object' of my invention A a continuous action at amaximum efciency is obtained by the automatic .removal of the fouledportion of the filtering medium, and another, object of the inventionresides in the provision of an apparatus for carrying the process intoeect, which combines simplicity V`of construction with ample capacityfor the treatment ofy a continuous feed.

` provide a filtering apparatus which may be operated for an indefiniteperiod without any renewal or repair of parts, excepting thereplenishment of the ifiltering vessel `after all the filtering mediumoriginally.

contained therein has been discharged.

With the above and other objects in view, all of' which will fullyappear inthe course of the following description, the improved apparatusused in thepractice of-.the filtering process, consists oftheconstruction, arrangement and combinations of parts shown ,in theaccompanying drawings in the several views of which `like parts aresimilarly .designated and in which Figur-'el is a sectional elevationofmy ,iin-

` proved filter in its preferred form;

Figure 2, a fragmentary section taken on the line 2i--2,Figure 1;

o Figure 3, an enlarged transverse sectlon f through the distributingtrough and the Scraper `of the apparatus, taken at right angle throughsaid' trough; v

Figure 4, a sectional elevation of afilter 4 of modified construction,and

S.. Con, a

yor intermittent motion is produced may be i Figure 5a section no theline 5-5, Figi lother Suitable lgranular material, and the comparativelyshallow. lower compartmentis designed to receive the liquid percolating.through the filtering medium and may if so desired be connected with anexhaust-fan or other suction producing` machine through the medium of aconduit 7 l The tank has'iin the center of its bottom a stuffing box 8of suitable construction for vthe water-tight passage ofk a cylindricalopen-ended' conduit 9 which in the opera-I tion of the device provides awell for the discharge of the residue and upper strati of the filteringmedium, as will hereinafter be more fully described. l

x I-n the Operation of the apparatuisthe weli isV gradually loweredthrough the filtering p, medium Jalle upper portion of which is atl Afurther nobject Ofmy invention is `to` .may take` place at intervalsaccording to the nature of the material underl treatment and thecondition of the filteringA medium, and the mechanism by which thiscontinuous ofany suitable construction. y

In Figure 1 of the drawings a mechanism of Simple construction is.shownffor the v continuous movementA of the well and in the .son

modifiedconstructionillustrated `in Figures i and' 5, the mechanism isdesigned 'for intermittent operation to move the well at regularintervals.

In the construction Shown `in Figure 1, the conduit is suspended from avertical shaft 10` which is rotatably supported in` operatesV with afixed nut 16 on the sup- 105 bportinglstructure.

`bearings on a structure 12 erected above the *190 worm 17 on a curing'shaft 18 meshes with the worm-wheel to rotate the shaft 10 and tosimultaneously impart a downward longitudinal movement thereto throughthe action of the screw-thread in the relativelyy stationary nut.

The shaft carries a feed bowl 19 and below the same a--distributingtrough 20 which extends radially inside the tank to 10 the interiorcircumferential surface thereof. l

The shaft carries, furthermore, a scraper 21 which curves in thedirection of its rotation to the circumference of the tank in a planewith the upper edge of the well.

The bowl 19 receives the `feed from a superposed hopper 22 through apipe 23 and l tank, through holes in its bottom, and`for convenience inconstruction, it is made in cured thereto, as best shown in Figure 2 ofthe drawings.

In the operation of my invention, the maf, terial is continuously fedont-o the surface of the filtering medium through theopenings of` thedistributing tank, the liquid in the ma-y terial percolating through thefiltering medium into the receiving compartment '5. while vthe solidresidue remainson the surface of the filtering medium until it ismovedinto the central well, by the action of the scraper.`

Inasmuch as in the operation of the filter the well is graduallylowered, the scraper removes together. with the residue of the ma- 40terial under treatment,l the upper strata of the filtering medium whichwerej fouled by contact therewith, and the filtering medium p is inconsequence maintained constantly in a condition of maximum porosity. v

Afteri all the filtering material has been discharged from'thetank, thelatter is refilled wtih either fresh filtering material or with thefiltering material separated ,from -the residuedischarged through thecentral Well. l

Y The process may be expedited by the pros :duction of a partial vacuumin thcfreceiving compartmentof the tank, and by the pro1 Y.

- vision of more than one scraper and 'distributlng troughtif thelnature of the material under treatment permits Vof a more rapid reysquared portion, and a worm 17 ona driving shaft 18 as in the firstdescribed form of my` moval of the residue.

Thevscraper may be of any suitable construction which adapts `it to moveall the 69 material settling upon the surface of the fil-- tering mediumtoward the entrance of the central well.

It will be seen from the above description -that my improved filteroperates asa dewaterer as well as a strainer and as such its vthetoothed segments of capacity maybe increased by restricting the outflowofthe discharge well and providing fliquid in the material above thelevel of the overflow.

The solids in the material settle on the surface of the filtering mediumand are in a4 thickened condition moved into the"central conduittogether with the upper strata of the filtering medium while part of theliquld `percolates througl@ the filtering medium as before, and anotherpart passes across the overflow.

. 25 conformity with the scraper and rigidly se-X` After the thickenedmatter conI regated on the surface offthe filtering me lum, is.

together with the upper strata ofthe latter, discharged from' the wellthrough theyalvecontrolled spout, it may, if so desired, be

separated from the filtering material and retained for other'uses whilev.the filtering material is returned to thetfilter to forma newfiltering bed after the tank has been emptied.

rThe mechanism for lowering the well through the filtering medium, -asshown in Figures 4 and 5, is adapted for intermittent operation toremove the upper strata of the `filtering medium and the thereondeposited thickened matter, at regular intervals.

It will be understood, however, that mechanism for the continuousremoval of the settled matter may be applied to this form of myinvention as well as to that shown in Figure 1 and that on the otherhand the well of the last-mentioned construction may v be loweredintermittently through the filter'- ing medium, if the conditiownsrequire thema` to settle through squared shaft 26 through the medium ofa.

swivel-joint 27a and the scraper 20 is fastened to the shaft 'asbefore sThe shaft is continuouslyjrotated through the medium of a worm.-wheel 14on its invention.\bu tgits` downward movement is periodicallyinterrupted through the action of an vintermittent gearing applied tothe i shaft in addition tothe other.

The gearing consists of a mutilated gearwheel 28 on the squared portionof the shaft, ywhich mesh with i pinions 29 at the" upper ends ofscrew-shafts 30, which work in nuts 31 on a bar 32 placed crosswise ofthe shaft 26.

The last-mentioned shaft ,rotates in an opening of the cross-piece andis compelled to follow the up and downward move-nient thereof, bycollars 33.

the toothed segments of the mutilated gearwheel, move into engagementwith the pinions at opposite sides thereof, the conse-quent rota-tion ofthe screw-shafts 30 in the nuts 31 will cause the cross-piece to lower'and through the medium ofthe collars 33 iinpart a downward movement tothe shaftl 26 and the therewith connected well which is held againstrotation by its frictional contact with the material through which itextends.

The shaft has been extended into the well and it carries at its lowerend, a paddle 3f to stir the thickened matter in the bottom of the welland thereby facilitate its discharge through the restricted outlet.

Having thus described my invention what I claim and desire to securev byLettter- Patent is:

1. A filter comprising a vessel containing a column of filteringmaterial, means for feeding liquid upon the column, means forwithdrawing filtrate therefrom and mechanism operative upon the surfaceof the filtering material where the liquid Jenters the column to'successively remove success-ive layers thereof together with thedeposit-'lcontained thereon.

Y nism operative to successively `remove 'successive layers fofthefiltering material together with the depositv contained therein,including means defining a well in the column, means for maintainingthefupper edge of the well in a definite relation to the surface of thecolumn, scraper means and means for 'successively advancing the scrap-4er means in the axial direction of the column.

4. A filter comprising Ya tank .having means for the discharge ofpercolated liquid,

a filtering medium in the tank, a well having a downward movementthrough the filtering medium, and meansl to move the upper strata ofsaid medium to the well.

5. A. filtercomprising a tank having an overflow and means for thedischarge of percolated liquid, a filtering medium in the tank, a wellhaving a downward movement through the filtering medium and having a iWhen inthe operation of the mechanism regulatable outlet, and means tomove the upper strata of said medium to the well.

6. A filter comprising a tank having means for the discharge ofpercolated liquid, a filtering-medium iii the tank, a well having adownward movement through the filtering medium, and a mechanicallyoperated scraper for moving the upper Istrata of the filtering medium tothe well, mounted to movl i in conjunction with the well.

7. A filter comprising a tank having means for the discharge ofpercolated liquid, a. filtering medium in the tank, a well having adownward movement through the filtering l medium, a trou-gh dischargingonto the surface of the same, and a scraper for moving the upper strataof the filtering medium, to the well, the trough and scraper beingmollnted to move in conjunction with the we 8. A filter comprising atank a perforated partition dividing the same in upper and lowerychambers, a filtering medium in the upper chamber, a central conduitpassing, through the chambers and having a downward movement, and ascraper for moving the upper strata of the filtering medium to theconduit, mounted to move in conjunction with the conduit.

9. .A filter comprising a tank, a perforated partition dividing thesaine in upper and lower chambers, a suction-device connected with thelower chambeigl'a filtering medium in Athe upper chamber, a centralconduit passing'through the chambers and having a downward movement, anda scraper for moving the upper strata of the filtering medium to thedconduitmounted to move in conjunction with the conduit.

10. A filter comprising a tank having means for the discharge ofpercolated liquid,

a, filtering medium in the tank, a rotary-and longitudinally movableshaft, an open-ended conduit connected with the shaft and passingthrough the lfiltering `medium in the tank, a scraper on the shaft for`moving the upper strata of the `filtering medium tol the' p conduit,and means for imparting a downward movement to the/shaft ,to lower theconduit in the tank'. i

11. A filter comprising a tank having means for the discharge ofpercolated liquid,

a filtering medium in the tank, a rotary andv longitudinally movableshaft, an open-ended iio conduitconnected with the 'shaft and passy ingthrough the filtering medium in the tank, a scraper on the shaft formoving the upper strata ofthe lterin medium to the conduit, a stirrer onthe s aft2 within the conduit7 and means for imparting a, downwardmovement to the shaft to lower the conduit in the tank. i,

12. The process of separating' solid ma.- terial fromsa liquid carryingthe same in suspension, which consists in passing the liquid togetherwith the material suspended therein onto a body of filtering materialunder conditions such as to cause the liquid lto pass through the same,and successively removing from the surface where the material enters thebody, layers of filtering materiali together with the solid particlesdeposited vthereon until the desiredamount of the tiltering material isremoved.

13. The process of separating solid ma- A terial from a liquid carryingthe same in suspension, which consists in. passing the liquid togetherwitht-he material suspended.

y therein, downwardly onto a body of filtering material and successivelyremoving layers f the liltering material together with the solidparticles deposited thereon from the upper surface of the' body offiltering ma.- terial until substantially all of the latter is removed.l i

. 14. rlhe process of separating solid material from a liquidA carryingthe same in suspension, which consists in passing the liquid togetherwith the material suspended therein, downwardly onto a column offiltering material, removing the liquid passing out of the column at thebottom thereof and 'successively removing the upper surface of thecolumn layers of the filtering material together'. with the solidmaterial deposited thereonuntil the desired amount ofthe filteringmaterial is removed.

In testimony whereof I have affixed my signature. Y

HARRISON COE.

